Charles m



(No Model.) I

' G. M. MARTIN.

FRIABLE VESSEL FOR CONTAINING CHEMICALS IN FIRE EXTINGUISHERS.

No. 246,898. Patented Sept. 13,1881,

I l H UNITED STATES PATENT OFFICE.

CHARLES M. MARTIN, OF NEW YORK, N. Y., ASSIGNOR TO THE WASHINGTON FIREEXTINGUISHER MANUFACTURING COMPANY, OF WASHINGTON,

DISTRICT OF COLUMBIA.

FRIABLE VESSEL FOR CONTAINING CHEMICALS IN FIRE-EXTINGUISHERS.

SPECIFICATION forming 'part of Letters Patent No. 246,898, datedSeptember 13, 1881.

Application filed February 10, 1881. (No model.)

To all whom ct may concern Be it known that I, CHARLES M. MARTIN, of thecity and State of New York, have invented certain Improvements inFriable Vessels for Containing Chemicals in the Interior ofFire-Extinguishers; and I hereby declare the following to be a full,clear, and exact description thereof, reference being had to theaccompanying drawings, making part of this specification, in whichFigure 1 is a vertical sectional view of my improved bottle in itssupporting-stirrup. Fig. 2 is a cross-section on line as a: of Fig. 1.

The object of my invention is to provide a bottle or vessel to be placedwithin the interior of a fire-extinguisher to hold chemicals, and to bebroken to discharge the chemicals, which shall be exceedingly friableand cheaply produced; and my invention consists in an elongated glassvessel or bottle having its upper part contracted abruptly, nearlyapproaching a right angle, to form the mouth of the vessel, and thebottom contracted in a truncated conical form, as hereinafter more fullydescribed and claimed.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the manner in which I have carried it out.

In the said drawings, A is the ring of the I supporting-stirrup, havingthe suspension-rods B B and the supporting cross-bar (1, upon whichrests the bottom of the bottle D. At its upper end the cylinder of thebottle is abruptly contracted nearly to a right angle at a a andthemouth d formed. Near the lower end of the cylinder it is contractedfrom b to b in the shape of a truncated cone. In applying this bottleits bottom is placed through the ring A and rests upon cross-bar C, theringA resting against the bottle about half-way between I) and b. Uponbringing a crushing strain down upon the mouth of this bottle it will befound to break Very easily at a and at the point where ring A touchesthe bottle between I) and b.

I find that the bottle constructed as described is certain in operationand of exceedingly-cheap production.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

An improved chemical-holding vessel for fire extinguishers, consistingof the bottle D, abruptly contracted at a to form the mouth d, andcontracted at its base from b to b in the shape 55 of a truncated cone,as set forth.

CHAS. M. MARTIN.

Witnesses R. K. EVANS, v JNo. L. CONDRON.

